Posterior Fossa Decompression
Chiari Malformation Treatment: Posterior fossa decompression is a procedure where a small area of the bone at the base of the skull is removed to enlarge the area in the lower rear skull being compressed into the spinal canal. The area is opened to enable visualization of the tough outer membrane of the brain called the dura. An incision is generally made in the dura to see the cerebellum and upper spinal cord. A piece of natural tissue, which lines the surface of the skull, is then used to patch the area in an effort to enlarge the region of the cerebellum (lower rear skull) and spinal canal.